Across
1
Proven mathematical statement
2
Lines that never intersect
5
System of ordered marks for measuring
8
Closed shape with straight sides
9
Symbol representing unknown value
Down
2
Number greater than zero
3
U-shaped curve of a quadratic function
4
Divisible by two
6
Part of a whole number
7
Amount of space an object occupies
10
Math using letters for unknown values
11
Line touching circle at one point